Create fair-cups-smile.md

Author: bobsingor

.changeset/fair-cups-smile.md

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+---
+'@embedpdf/snippet': patch
+---
+
+Add form plugin support to the snippet API and expand the snippet documentation with standalone vanilla HTML examples.
+
+This includes exporting the form plugin types from `@embedpdf/snippet`, updating form-related command/category behavior, and adding vanilla Tailwind examples plus new plugin docs for forms.